Beta Williamson County, TX only — data and coverage are limited during early access.

16516 CASTLETROY DR, AUSTIN, TX 78717

AUSTIN, 78717 — williamson County

4 bed3 bath1,210 sqftBuilt 2001

Property at a Glance

This home is estimated between $269,028 and $592,432, with a best estimate of $581,593. That places the property above the R250401D - AVERY RANCH EAST (PH. 1) median of $524,962, in a neighborhood that declined 2.2% over the past year.

Estimated Value Range

$269,028 $592,432
Best Estimate
$581,593
WCAD Value
$524,962
Low Confidence

Based on 5 comparable properties(2 in the same subdivision)

There are 5 comparable properties within range, but few are in R250401D - AVERY RANCH EAST (PH. 1). The estimated range of $269,028 and $592,432 should be treated as a rough guide.

Comparable Properties (5)

16425 CASTLETROY DR, AUSTIN, TX 78717
0.00 mi 100% similar Same subdivision
3 bed 2 bath 1,181 sqft Built 2002
Raw Value $576,117
Adjusted Value $592,432

Adjusted +$8,885 for 29 sqft more living space and +$7,430 for being newer. Net adjustment: +$16,315.

4 bed 3 bath 1,293 sqft Built 1992
Raw Value $598,744
Adjusted Value $506,444

Adjusted -$25,430 for 83 sqft less living space and -$66,870 for being older. Net adjustment: -$92,300.

4 bed 2 bath 1,243 sqft Built 1993
Raw Value $651,144
Adjusted Value $581,593

Adjusted -$10,111 for 33 sqft less living space and -$59,440 for being older. Net adjustment: -$69,551.

4 bed 2 bath 1,322 sqft Built 1996
Raw Value $655,445
Adjusted Value $583,980

Adjusted -$34,315 for 112 sqft less living space and -$37,150 for being older. Net adjustment: -$71,465.

16409 CASTLETROY DR, AUSTIN, TX 78717
0.00 mi 94% similar Same subdivision
3 bed 2 bath 1,872 sqft Built 2002
Raw Value $464,425
Adjusted Value $269,028

Adjusted -$202,827 for 662 sqft less living space and +$7,430 for being newer. Net adjustment: -$195,397.

The Neighborhood

This home is in line with the R250401D - AVERY RANCH EAST (PH. 1) median of $524,962. Note that values in this subdivision declined 2.2% over the past year.

R250401D - AVERY RANCH EAST (PH. 1)

typical
323 Properties
$524,962 Median Value
-2.2% YoY Change
0% Have Pool
100% Have Garage
This Home
$524,962
Median
$524,962

This home is +0.0% above the subdivision median.

Tax Analysis

The estimated annual property tax is $10,244 across all districts. With a homestead exemption claimed, that drops to $8,346 — saving $1,898 per year. That's $696 per month a buyer should budget. The assessed value increased roughly in line with the neighborhood, so a tax protest is unlikely to yield significant savings.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$4,688
AustinCity0.5240%$2,751
Williamson CountyCounty0.3694%$1,939
Austin Community Collegespecial0.1034%$543
Williamson County FM/RdCounty0.0443%$233
Upper Brushy Creek WCIDWater0.0170%$89
Road District (R02)Road0.0000%$0
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.9513%$10,244

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $581,593 would pay approximately $3,630 per month (principal and interest only, excluding taxes and insurance).

Data sourced from Williamson County Appraisal District (WCAD), Texas Education Agency (TEA), and Federal Reserve Economic Data (FRED). Assessment values reflect the appraisal district's estimate, not market sale prices. Report generated 4/18/2026.

View full property details